Reactivity of the Pyridylthiosilyl Enol Ether — Route to b-Lactone and b-Lactam —
摘要:
A simple and facile method for beta-ractone and beta-lactam syntheses based on a Lewis acid promoted pyridylthiosilyl enol ether (1) addition to an aldehyde or Schiff base is described.
Versatile Synthesis of an Intermediate for the 1b-Methylcarbapenem Synthesis
摘要:
A 1 beta-Methylcarboxylate (1) which is a requisite intermediate for the synthesis of the 1 beta-methylcarbapenem was obtained in an efficient manner by the coupling reaction of a Z(O)-pyridylthiosilyl enol ether and a 4-acetoxyazetidinone derivative in the presence of ZnCl2 in CH2Cl2. The reactive silyl enol ether was prepared by the reverse addition method in high yield.
Reactivity of the Pyridylthiosilyl Enol Ether — Route to b-Lactone and b-Lactam —
作者:Koichi Hirai、Hiroshi Homma、Isamu Mikoshiba
DOI:10.3987/com-93-6604
日期:——
A simple and facile method for beta-ractone and beta-lactam syntheses based on a Lewis acid promoted pyridylthiosilyl enol ether (1) addition to an aldehyde or Schiff base is described.
Versatile Synthesis of an Intermediate for the 1b-Methylcarbapenem Synthesis
A 1 beta-Methylcarboxylate (1) which is a requisite intermediate for the synthesis of the 1 beta-methylcarbapenem was obtained in an efficient manner by the coupling reaction of a Z(O)-pyridylthiosilyl enol ether and a 4-acetoxyazetidinone derivative in the presence of ZnCl2 in CH2Cl2. The reactive silyl enol ether was prepared by the reverse addition method in high yield.